微信开发 PHP代码 天气预报

<?php
/**
  * wechat php test
  */

//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();
$wechatObj->responseMsg();
class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }

    public function responseMsg()
    {
        //get post data, May be due to the different environments
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

        //extract post data
        if (!empty($postStr)){

                $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $type = $postObj->MsgType;
                $customrevent = $postObj->Event;
                $latitude  = $postObj->Location_X;
                $longitude = $postObj->Location_Y;
                $keyword = trim($postObj->Content);
                $time = time();
                $textTpl = "<xml>
                            <ToUserName><![CDATA[%s]]></ToUserName>
                            <FromUserName><![CDATA[%s]]></FromUserName>
                            <CreateTime>%s</CreateTime>
                            <MsgType><![CDATA[%s]]></MsgType>
                            <Content><![CDATA[%s]]></Content>
                            <FuncFlag>0</FuncFlag>
                            </xml>";             
                switch ($type)
            {   case "event";
                if ($customrevent=="subscribe")
                    {$contentStr = "感谢你的关注\n回复1查看联系方式\n回复2查看最新资讯\n回复3查看法律文书";}
                break;
                case "image";
                $contentStr = "你的图片很棒！";
                break;
                case "location";
                $weatherurl="http://api.map.baidu.com/telematics/v2/weather?location={$longitude},{$latitude}&ak=1a3cde429f38434f1811a75e1a90310c";
                 $apistr=file_get_contents($weatherurl);
                 $apiobj=simplexml_load_string($apistr);
                 $placeobj=$apiobj->currentCity;//读取城市
                 $todayobj=$apiobj->results->result[0]->date;//读取星期
                 $weatherobj=$apiobj->results->result[0]->weather;//读取天气
                 $windobj=$apiobj->results->result[0]->wind;//读取风力
                 $temobj=$apiobj->results->result[0]->temperature;//读取温度
                 $contentStr = "{$placeobj}{$todayobj}天气{$weatherobj}，风力{$windobj}，温度{$temobj}";
                break;
                case "link" ;
                $contentStr = "你的链接有病毒吧！";
                break;
                case "text";
                $weatherurl="http://api.map.baidu.com/telematics/v2/weather?location={$keyword}&ak=1a3cde429f38434f1811a75e1a90310c";
                 $apistr=file_get_contents($weatherurl);
                 $apiobj=simplexml_load_string($apistr);
                 $placeobj=$apiobj->currentCity;//读取城市
                 $todayobj=$apiobj->results->result[0]->date;//读取星期
                 $weatherobj=$apiobj->results->result[0]->weather;//读取天气
                 $windobj=$apiobj->results->result[0]->wind;//读取风力
                 $temobj=$apiobj->results->result[0]->temperature;//读取温度
                 $contentStr = "{$placeobj}{$todayobj}天气{$weatherobj}，风力{$windobj}，温度{$temobj}";
                  break;                    
            default;
            $contentStr ="此项功能尚未开发";   
            }
                $msgType="text";
                $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                echo $resultStr;


        }else {
            echo "";
            exit;
        }
    }

    private function checkSignature()
    {
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];    

        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );

        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
}

?>